Normative reference value of thoracic expansion in school going boys with age group 5-15 year.

To establish the normative reference value of thoracic expansion in asymptomatic individuals of aged between 5 to 15 years. 350 boys were recruited in this study. After the chest expansion measurements, procedure of chest expansion test was explained to the participants. To check the chest expansion participants were asked to standing at rest and asked to take deep birthing inhale to exhale then measurements of Axilla, Nipple, Ribcage are taken. Descriptive statistics were expressed in mean with 95% for Age, Height, Weight, and BMI. 11.43 (11.15-11.70) in years, 2.44 (1.40-3.47) m, 36.64 (35.49 37.48) kg. 18.69 (18.45-18.93) kg/m². Mean value and 95%CI of chest expansion Measurement of the axilla, Nipple, and Ribcage, 2.99 (2.92-3.07) cm, 241 (2.35-2.46) cm, 2.06 (2.04-2.09) cm, respectively. The p-value>0.005 was kept as a level of significance for normative reference value: Representation of variables was in term of Geometric mean with 95% Confidence Interval. Keywords: chest expansion, pediatrics population.本研究旨在建立5至15岁无症状人群的胸廓活动度（thoracic expansion）正常参考值。本研究共招募350名男性儿童受试者。在完成胸廓活动度测量后，研究人员向受试者讲解了胸廓活动度测试的操作流程。为开展胸廓活动度测量，要求受试者保持静立姿势，先进行深吸气后再呼气，随后分别测量腋窝（Axilla）、乳头（Nipple）及胸廓（Ribcage）处的活动度数值。 年龄、身高、体重及体质量指数（BMI，Body Mass Index）的描述性统计结果以均值及95%置信区间（95%CI，95% Confidence Interval）表示：年龄为11.43（11.15~11.70）岁，身高为2.44（1.40~3.47）米，体重为36.64（35.49~37.48）千克，体质量指数为18.69（18.45~18.93）kg/m²。腋窝、乳头及胸廓处的胸廓活动度测量值的均值与95%置信区间分别为：2.99（2.92~3.07）厘米、2.41（2.35~2.46）厘米、2.06（2.04~2.09）厘米。本研究将p值>0.005作为正常参考值的显著性检验水准：变量以几何均值（geometric mean）及95%置信区间进行表示。 关键词：胸廓活动度，儿科人群。